Add an accessibility mode for editable text fields only.

content/public/browser/render_widget_host.h

Index: content/public/browser/render_widget_host.h
diff --git a/content/public/browser/render_widget_host.h b/content/public/browser/render_widget_host.h
index 2a5bf15a1ec0df8ccd7373ae8dd56c41303cebe3..9093e8929b153dd932e756653211b15695062f0c 100644
--- a/content/public/browser/render_widget_host.h
+++ b/content/public/browser/render_widget_host.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include "content/common/content_export.h"
+#include "content/common/view_message_enums.h"
 #include "content/public/browser/keyboard_listener.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "ipc/ipc_channel.h"
@@ -196,9 +197,8 @@ class CONTENT_EXPORT RenderWidgetHost : public IPC::Channel::Sender {
                                                CGContextRef target) = 0;
 #endif
 
-  // Enable renderer accessibility. This should only be called when a
-  // screenreader is detected.
-  virtual void EnableRendererAccessibility() = 0;
+  // Send a command to the renderer to change the accessibility mode.
+  virtual void SetAccessibilityMode(AccessibilityMode mode) = 0;
 
   // Forwards the given message to the renderer. These are called by
   // the view when it has received a message.